Design of wideband/dual‐band bandpass filter using a vias and slots loaded sector circular patch resonator

2021 ◽  
Author(s):  
Wei Sheng Tang ◽  
Bing Jie Xiang ◽  
Shao Yong Zheng ◽  
Yun Liang Long
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Circular Patch

scholarly journals Design of a Multilayer Dual-Band Balanced Bandpass Filter on a Circular Patch Resonator

2021 ◽  
Vol 9 ◽  
Author(s):  
Yanhui Xu ◽  
Zhengkang Liu ◽  
Shiyan Wang ◽  
Wanchun Tang ◽  
Junxin Chen
Keyword(s):  
Return Loss ◽  
Bandpass Filter ◽  
Resonant Mode ◽  
Dual Band ◽  
Center Frequency ◽  
Harmonic Suppression ◽  
Differential Mode ◽  
Circular Patch ◽  
Patch Resonators ◽  
Internal Coupling

This letter presents a novel multilayer dual-band balanced bandpass filter (BPF) design by using two perturbed circular patch resonators. The TM11 mode and TM21 mode of the resonator with odd-symmetric field distributions are explored to realize the desired differential-mode (DM) transmission and common-mode (CM) suppression. Two circular patches are properly coupled in the back-to-back form to realize a dual-passband balanced response by virtue of coupling apertures etched on the ground. In addition to the internal coupling, the above apertures are also further utilized for the undesired degenerate mode harmonic suppression. Besides, slot perturbations on the patch are introduced to perturb the TM21 resonant mode to independently adjust the center frequency of the higher passband, while the lower passband remains almost unchanged. Thus, two passbands can be flexibly controlled by simultaneously tuning the above slots and size of the patch. For validation, a dual-band balanced BPF prototype is implemented. The results indicate 18 and 26% wide fractional bandwidths centered at 5.5 and 7.5 GHz with return loss higher than 20 dB under DM operation and CM suppression higher than 40 dB over an ultra-wide frequency band.

Design of a Dual-Band Bandpass Filter Using Active Inductor Principle

2017 ◽  
Vol 7 (4) ◽  
pp. 342
Author(s):  
Imane Halkhams ◽  
Said Mazer ◽  
Mahmoud Mehdi ◽  
Moulhime El Bekkali ◽  
Wafae El Hamdani
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Active Inductor

Millimeter-Wave Dual-Band Bandpass Filter With Large Bandwidth Ratio Using GaAs-Based Integrated Passive Device Technology

2021 ◽  
Vol 42 (4) ◽  
pp. 493-496
Author(s):  
Guangxu Shen ◽  
Wenjie Feng ◽  
Wenquan Che ◽  
Yongrong Shi ◽  
Yiming Shen
Keyword(s):  
Millimeter Wave ◽  
Bandpass Filter ◽  
Dual Band ◽  
Passive Device ◽  
Large Bandwidth ◽  
Device Technology
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